Multiple-spindle drill



June 5, 1928.

W. P. HUNT MULTIPLE SPINDLE DRILL Filed June 50, 1926 TEA w /8 I VJ INVENTOR. v VMMA M.

. BYW/m/hW' M ATTORNEY.

Patented June 5 1928.

UNITED" STATES PATENT flames.

wItsoN P. HUNT, or nouns, I LLINO IS, ASSIGNOR T0 MOLINE .Toor. comranv; or

aromas. LLINOIS.

mcL'rrrngs-srmmin DRILL. j

Application filed June fab, 1926. s rial No. 119,593.

My invention has reference to. multiple of the arm, with a cross-section through the spindle drills, and has for its'chief purpose to increasethe simplicity and efficiency of such machines. Onaccount ofthe fact that} r the drills which are used in these machines are frequently of different lengths, and that the work frequently callsforthe boiiing of means for the shaft .13, in section.

The reference number 1 indicates adrill holes of ditferent depths, it has been found to be desirable to support the drills so that they could be adjusted vertically. This has usually been provided for by supporting the bearing for the spindleso that it could be. adjusted with relation. to the: supporting arm. This has not been easy of accomplishment'on account of the fact that it is necessary to connect the bearing and arm by at least two bolts, one of which was not readily accessible when it was desired to make an adjustment.

In the present invention the spindle hearing is provided with a separate bushing or sleeve, which carries the spindle, and this bushing is arranged for adjustment vertically in a very simple and effective manner, somewhat similar to micrometer adjustments.

Another object of the invention is to so construct the device that it will be possible to have the supporting arm and spindle hearing rigidly united, and do away with the bolts by which said parts have usually been connected, and by means of which the adjustments have heretofore been made.

Another purpose thereof is to so construct the device as to make it possible to make the necessary adjustments by the use of a single operative part, which is readily accessible for operation by a wrench or similar tool, even when thedrills are positioned in close proximity to each other.

Another object thereof is to provide means for reventing the parts from getting out of a just-ment, so that there is no danger of a disturbance of the set-up, after the same has been made. p r

The above-named, and other features and advantages of the invention will more fully appear from the following specification, taken in connection with the accompanying drawings, in which;

Fig. 1 is a longitudinal section of a drill supporting arm and mechanism supported thereby.

'of said spindle is a drill holder 10.

Fig. 2 is aplan view of the forward end upper end of the spindle.

Fig. 3 is a detail of the plate 18. r

4 is a sideelevation of the part of the bushing 5. i i V i Fig. 5 shows another form of locking head, to the lower face of which is secured the outer end of th arm 2 is a boxing 4,

which in the present construction is formed upp in theend of the arm by extendinga vertical bore therethrougl'i. In said bore is held a bushing 5, having its upper end threaded to correspond with a thread in the upper part of such bore, as indicated at 6, the thread on the bushing being shown at 7. ByrotEltlDg said bushing it is caused to move upwardly or downwardly in said bore, asdesired.

Rotatably mounted in the bushing 5 is a spindle 8, threaded at its upper end to re- 7 ceive a pair of nuts 9. ()n the lower end The upper end of the bushing 5 is also channeled, forming elongated teeth 11 thereon, which teeth are engaged by the teeth of a gear-wheel 12 on the end of a shaft 13, re tatable in a smaller bore in the arm 2, the lower end of said shaft bein squared to form a wrench hold, whereby t 1e shaft may be rotated, the movement thereof being imparted to the bushing 5, to give rotation thereto. Theshaft 13 is also formed with asquare shoulder as shown at 16, such shoulder being fitted to enter an aperture 17 of similar size and shape in a plate 18 fixed to the lower side of the arm 2. When in this position the shaft 13 isheld from rotation.

the rotation of said shaft and the wheel 12 thereon, such movement is imparted to the bushing 3 and spindle therein, moving the same upwardly or downwardly, as desired. By providing threads of a proper pitch on the bushing the movement thereof may b made a very gradualone, so as to secure close adjustments of the drill held in the spindle. After the desired adju stment of the spindle has been made the shoulder 16 is worked into thee ening 17 again, and the shaft 13 and bushing 5 locked from further movement.

'Atth'eu per end'o'f the spindle Sis shown a universa joint 19, of common form, by means of which the spindle may he nected with an operating shaft.

It will be observed that the shaft 13 ie almost entirely out of the way, at the rear of the spindle, and in a position easy of access for an operating tool. The space occupied by said shaft and its projecting'end is so limited that even when the spindles are grouped in close proximity to one another, there is ample room for said operating devices; i

In Fi 5 is shown another means for locking the shaft 13 from movement, the seat in the arm 2 for the wheel 12 being provided with a pin20, adaptedfor engagement with theteeth of said wheel, when the shaftis in its lowest position. By :this arrangement the shaft can be locked b a relatively less amount of rotation than y theuse of the to conmpobd shoulder 16, which would be dispensed with in the esent arran ement. 7

It wsl be observe that the teeth of the wheel 12 will be in mesh with the earing on the bushing 5 in any position t at the bushing is in, verti'oaliy.

Whitti claim, and desire to secure by Letters Patent, is

In' a device of the class described, a spindlesupgnlting arm a bore in the end thereof fitte with screw threads, 9. bushing rotltahle in said here, adapted for the suppoct of a spindle, and exteaiorly threaded with mid find-named thread, gaming-on isaid bushing, a shaft rotatably mmmtadiin slid arm, andcapahle of verticat movement therein, aiear-wheel on said Qmft in -mesh with ithe'igeari on said bushim iiaall ,l'elfltivfipfisitldnio the bushing a shaft, and means fox-kicking said shaft fimm rotation wheniat .its lowest ,point, the operation of said shaft lifting it from'ra locked position, and the next opemotion giving rotation thereto. 7

hrtestimony w-lmrooftl signature.

: 1 WILSON -P. HUNT. 

